$sin\left(8\alpha\:\right)=8sin\left(\alpha\:\right)cos\left(\alpha\:\right)cos\left(2\alpha\:\right)cos\left(4\alpha\:\right)$

$9x^12+23x^6+144$

$\int\left(\frac{\left(x^4\right)}{x^2-1}\right)dx$

$208\cdot30$

$\left(\frac{2}{3}a^3-\frac{1}{2}a^2b\right)+\left(\frac{1}{2}a^3+\frac{3}{4}a^2b-5a^3b^2\right)$

$cot^2\left(x\right)-3.6=0\:xe\left[0,2\pi\right]$

$\left(x+3\right)\left(15x+12\right)$